PHP corrupted file - php

Question

This is the page where I click on the download button.
This is the things I found online but it did not work
why my downloaded file is alwayes damaged or corrupted?
Force Downloading a PDF file, corrupt file
$query = "SELECT id, name FROM docu";
$result = mysqli_query($con,$query) or die('Error, query failed');
if(mysqli_num_rows($result)==0){
echo "Database is empty <br>";
}
else{
while ( (list($id, $name) = mysqli_fetch_array($result, MYSQLI_BOTH))){
?>
<p>Name : <?= $name ?></p>
This is the download code. When I download the file, it say it is corrupted.
if(isset($_GET['id'])){
$id = $_GET['id'];
$con = mysqli_connect("localhost:3306", "waduser", "waduser", "fyp");
if(!$con) {
die("cannot connect: " . mysqli_error());
}
mysqli_select_db($con,"fyp");
$query = "SELECT * FROM docu where id ='" .$id ."'";
$result = mysqli_query($con,$query) or die('Error, query failed');
if($row = $result -> fetch_array(MYSQLI_ASSOC))
{
$name = $row['name'];
$type = $row['type'];
$content = $row['content']; //content of file
$size = $row['size']; //file size
header('Content-Type:"' . $type . '"');
header('Content-length:' . $size .'');
header('Content-Disposition: attachment; filename="' .$name. '"');
}
}
?>

Answer 1

I think what Jim is trying to say is that you have sent all the headers but you have not actually sent the file itself.
So try
$name = $row['name'];
$type = $row['type'];
$content = $row['content']; //content of file
$size = $row['size']; //file size
header('Content-Type:"' . $type . '"');
header('Content-length:' . $size .'');
header('Content-Disposition: attachment; filename="' .$name. '"');
echo $content;
Also I think its safer to remove the spaces around your short_tag usage at least in the href property.
<p>Name : <?= $name ?></p>